[autoscaler] Allowing users to provide extra configs for AWS (#7844)

* Allowing users to provide custom key names & security group inbound rules

* linting

* getting aws credentials passed in

* one more thing

* one more thing part 2

* formatting

* addressing comments

* update

* update

* update

* update

* update

* update

* remove tests

* rerun tests

Co-authored-by: Allen Yin <allenyin@anyscale.io>

python/ray/tests/test_autoscaler.py

@@ -328,11 +328,6 @@ class AutoscalingTest(unittest.TestCase):
             validate_config(config)
         del config["blah"]
 
-        config["provider"]["blah"] = "blah"
-        with pytest.raises(ValidationError):
-            validate_config(config)
-        del config["provider"]["blah"]
-
         del config["provider"]
         with pytest.raises(ValidationError):
             validate_config(config)